Security threads and stripes
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United States of America Patent
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Jul 17, 2018
Grant Date -
Feb 16, 2017
app pub date -
Jan 20, 2015
filing date -
Feb 13, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to the field of the protection of value documents and value commercial goods against counterfeit and illegal reproduction. In particular, the present invention relates to security threads or stripes comprising a holographic metallic layer; a first transparent substrate; a second transparent substrate; a first hardened coating and a second hardened coating, wherein a first plurality of non-spherical magnetic or magnetizable pigment particles of the first hardened coating are oriented so as to follow a convex curvature and wherein the second plurality of non-spherical magnetic or magnetizable pigment particles of the second hardened coating are oriented so as to follow a concave curvature so as to form a plural rolling bar effect.
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